Question

StoredProcedure的

create or replace procedure my_procedure
is
cursor c_emp is select * from employees;
r_name c_emp%rowtype;
begin
open c_emp;
loop
fetch c_emp into r_name;
DBMS_OUTPUT.PUT_LINE(r_name.EMP_NAME);
EXIT WHEN c_emp%NOTFOUND;
END LOOP;
close c_emp;
END;

JDBC代码

stmt=conn.prepareCall("{call my_procedure}");

      stmt.registerOutParameter(1, java.sql.Types.VARCHAR);
      ResultSet rs = stmt.executeQuery();
      while(rs.next()) {
            System.out.println( rs.getString(1));
        }

显示错误，如

错误：

java.sql.SQLException: Invalid column index
    at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:113)
    at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:147)
    at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:209)
    at oracle.jdbc.driver.OracleCallableStatement.registerOutParameterInternal(OracleCallableStatement.java:122)
    at oracle.jdbc.driver.OracleCallableStatement.registerOutParameter(OracleCallableStatement.java:285)
    at oracle.jdbc.driver.OracleCallableStatement.registerOutParameter(OracleCallableStatement.java:371)
    at table.callstmt_storedprcd.main(callstmt_storedprcd.java:27)

我不知道为什么会出现这样的错误。请纠正我的错误。

Answer 1

DBMS_OUTPUT用于向屏幕显示消息。它不是OUT参数。

您的程序没有参数。因此，这将打破你的计划：

  stmt.registerOutParameter(1, java.sql.Types.VARCHAR);

获取错误（java.sql.SQLException：列索引无效）

1 个答案: